Force Interleave ???

[bstewart]

I've tried searching but have found no answer, unfortunately most searches for interlacing bring up de-interlacing.

I have some 720x576 50p files which I am trying to put on DVD as interlaced (25i) rather than progressive (25p) to keep motion as smooth as possible.
The resulting DVD would be played on a DVD through a TV so interlaced looks better than progressive.

For information, the original footage was 25i from a minidvd camcorder but some scenes have a bit of camera shake.
I used Kdenlive VSTAB to reduce the shake (which worked very well) but this seems to produce 25p from the 25i input.

I then extracted the original video using handbrake with bob deinterlacing which produced a 50p file and have subsequently de-shaked this at 50p using Kdenlive VSTAB again giving me a smooth 50p file.

Obviously I can create my DVD with 25p but would prefer the better motion smoothness that 25i would give.

Tools available:-
Linux (Ubuntu 12.04), Kdenlive, Videostyler, ffmpeg, ffmbc, mencoder, handbrake (+ anything easily loaded in Ubuntu).

[poisondeathray]

interlaced PAL DVD ?

In ffmpeg, to generate 50p => 25i TFF : -vf interlace
http://ffmpeg.org/ffmpeg-filters.html#interlace

To encode interlaced, TFF => -flags ildct+ilme -alternate_scan 1 -top 1

-target pal-dvd for PAL DVD compliant MPEG2 encoding settings



e.g for elementary video stream (you need to set bitrate as well, according to a DVD bitrate calculator, I used 6Mb/s in this example)

ffmpeg -i 50p_input_file.ext -vf interlace -flags ildct+ilme -alternate_scan 1 -top 1 -target pal-dvd -b 6000k -an output.m2v

[bstewart]

Hi poisondeathray,
Once again you've come to my rescue. It sort of worked.
The command was not compatible with my ffmpeg 0.7 and couldn't download later than 0.10.9-7 (still didn't accept interlace) into Ubuntu.

I'm concerned that a later version may not be backward compatible with Kdenlive or handbrake.

Extracted a static version which I ran with ./ffmpeg.
Got an error message related to -b , need :a or :v so added :v. Also removed the -an to get audio.

./ffmpeg -i input.m4v -vf interlace -flags ildct+ilme -alternate_scan 1 -top 1 -target pal-dvd -b:v 6000k output.m2v

This seems to work OK.
I seem to struggle finding the command options to use with ffmpeg, many don't seem to be in the documentation - or is it just me?

many thanks

[poisondeathray]

I just know the basic and commonly used ffmpeg commands

There aren't any good comprehensive guides, and they seem to be changing the syntax quite frequently

The reason I suggested elementary video only, is ffmpeg's muxer isn't the best (you can get stuttering) . I would use a reputable 3rd party DVD multiplexer / authoring tool like muxman (but I don't think there is a unix version ...)